基于噪声子空间特性的波束形成器设计

doi:10.12305/j.issn.1001-506X.2021.08.32

Abstract

Abstract:

To efficiently synthesize array receiver signals with high performance, a beamformer design based on noise characteristics is proposed. Firstly, by utilization of the noise's wide-band distribution characteristic, the Capon spatial spectrum is coarsely sampled across the noise range, yielding a residual noise offset to estimate the signal covariance matrix. Secondly, on basis of the orthogonality between the noise subspace and the signal subspace, a signal orthogonal complement projector is constructed from the decomposition of this signal covariance matrix. Finally, in terms of the orthogonality between the noise subspace and the interference subspace, this projector is used to process the observed signals to acquire the estimation of the interference power, from which both the interference plus noise covariance matrix and the final beamformer can be derived. Simulation results show that the proposed method can achieve high signal to interference plus noise ratio across a wide signal to noise ratio range, only consuming small number of snapshots.

Key words: beamformer, noise subspace, covariance matrix, Capon spatial spectrum

CLC Number:

TN911.72

Xiangdong HUANG, Yiran ZHAO, Di MIAO. Beamformer design based on noise subspace characteristics[J]. Systems Engineering and Electronics, 2021, 43(8): 2297-2302.

Figures/Tables 3

References 16

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Beamformer design based on noise subspace characteristics

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